Steve Bannon is out as White House chief strategist, according to a senior administration official, amid growing displeasure in the West Wing with his tactics and behavior.

His departure marks the latest high-level staff shake-up that has rocked Trump’s administration.

The official said Bannon had resigned on August 7, but other officials noted that President Donald Trump had grown tired of his chief strategist’s approach and had been plotting ways to oust him.

Bannon, known as a populist firebrand who pushed Trump toward strongly nationalist views, often clashed with other White House aides and had a rocky relationship with the president for months.

He particularly butted heads with the globalist wing of the White House, which includes Trump’s son-in-law and senior adviser Jared Kushner and National Economic Council Director Gary Cohn.

But he had played a central role in helping Trump win the White House, shaping the billionaire businessman’s populist message in a way that resonated with millions of Americans unhappy with the progress of the economic recovery.

Still, Trump chafed at the impression that Bannon was in the drivers’ seat in the White House, including a Time Magazine cover that called him “The Great Manipulator” and Saturday Night Live skits that put him behind the resolute desk.

Bannon’s exit comes shortly after Trump ousted chief of staff Reince Priebus and replaced him with Homeland Security’s John Kelly, a retired Marine general who has been trying to impose more discipline in the West Wing.